弱碱性芳胺重氮盐固体的制备及其稳定性研究

A Study on Preparation and Stability of Solid Diazonium Salt of Weakly Basic Aromatic Amine

介绍了2,4-二硝基苯胺、2,6-二氯-4-硝基苯胺、2-氰基-4-硝基苯胺、2,4-二硝基-6-溴苯胺、2,6-二溴-4-硝基苯胺、2-氯-4-硝基苯胺、2,4-二硝基-6-氯苯胺七种弱碱碱性芳胺重氮盐固体的制备方法,并对其稳定机理进行了探讨。对制备得到的各重氮盐固体进行了热重分析,得到了它们各自的热分解温度,为该类芳胺在溶剂中进行重氮化反应制备重氮盐固体,提供了有力的数据支撑。

The preparation methods for solid diazonium salts of seven weakly basic aromatic amines were introduced,they were 2,4-dinitroaniline,2,6-dichloro-4-nitroaniline,2-cyano-4-nitroaniline,2,4-dinitro- 6-bromoaniline,2,6-dibromo- 4-nitroaniline,2-chloro-4-nitroaniline and 6-chloro-2,4-dinitroaniline. The stability mechanism was discussed. Their thermal decomposition temperatures were obtained by thermogravimetric analysis,respectively. The experiment results provided compelling data for the preparation of solid diazonium salt by diazotization of the aromatic amines in solvent.